Final answer:
The given equation is a redox reaction, where pyruvate is reduced to lactate, typically seen in anaerobic glycolysis.
Step-by-step explanation:
The reaction type of the given equation which is Pyruvate + 2H+ + 2 electrons → lactate is a redox reaction. In the context of metabolic reactions, the addition of protons (H+) and electrons is considered a reduction, whereas their removal signifies oxidation. This specific equation represents the reduction part of a redox reaction, where pyruvate is being reduced to lactate, concurrent with the oxidation of nicotinamide adenine dinucleotide (NADH) in a separate but coupled reaction. Although not explicit in the equation presented, the metabolism of glucose to lactate (anaerobic glycolysis) involves the oxidation of NADH to NAD+ to enable the conversion of pyruvate to lactate.